32A KDHC Series Changeover Switch is applicable in electrical circuits with AC 50Hz, rated operating voltage up to 440V and DC voltage up to 240V, with a conventional thermal current up to32A. They are used for manual, infrequent circuit make-and-break for control and circuit conversion. They are mainly installed on NBC-200, 250, 315, 400, 500, 630 and other CO₂ gas shielded welders, inverter arc welders and air plasma cutting machines to adjust current or voltage. They can also be used for circuit switching of electrical equipment.
KDHC Series Switch for Welding Machine
|
Type |
KDHC-20 |
KDHC-32 |
KDHC-40 |
KDHC-63 |
|
Rated insulation voltage Ui (V) |
690 |
690 |
690 |
690 |
|
Conventional thermal current Ith (A) |
20 |
32 |
40 |
63 |
|
Rated operating voltage Ue (V) |
380V |
380V |
380V |
380V |
|
Rated operating current Ie (A) |
20 |
32 |
40 |
63 |
|
Mechanical life |
10×10⁴ cycles |
10×10⁴ cycles |
10×10⁴ cycles |
10×10⁴ cycles |
|
Application |
For NBC-200, -250, -315, -400, -630 CO₂ type welding machine |
For NBC-200, -250, -315, -400, -630 CO₂ type welding machine |
For NBC-200, -250, -315, -400, -630 CO₂ type welding machine |
For NBC-200, -250, -315, -400, -630 CO₂ type welding machine |
The KDHC Series Welding Machine Switch adopts rotary cam mechanical structure. When users rotate the operating handle, the built-in cam assembly moves synchronously to control the on/off status of each contact group. By switching different contact combinations, the circuit accesses different resistance or tap positions, realizing the adjustment of welding current and output voltage.
This manual cam switching design is for infrequent circuit make-and-break. It changes the circuit parameters stably without complex electronic components. The high-quality silver contacts ensure reliable electric connection when the cam is engaged, avoiding poor contact and arc damage during welding equipment operation.
1.Premium Silver Alloy Contacts: High conductivity, strong arc suppression, anti-oxidation and anti-abrasion, greatly prolong the service life of the KDHC Series Welding Machine Switch.
2.Integrated Cam Structure: Precisely machined cam core, clear gear positioning, smooth rotation and no jumping during parameter adjustment.
3.High Insulation Housing: The switch is designed with high-strength insulating material, rated insulation voltage up to 690V, safe and reliable under 380V working condition.
4.Multiple Current Specifications: KDHC-20, KDHC-32, KDHC-40, KDHC-63 optional, to match different power grades of CO₂ welders.
5.Customizable Structure: Our China factory supports OEM customization including gear quantity, wiring terminal layout and marking for different welder designs.
6.Compact Assembly: Reasonable internal layout, easy to install inside limited cabinet space of welding machines.
Every KDHC Series Welding Machine Switch undergoes strict product inspection before leaving our China factory. We carry out the following key tests one by one to guarantee stable performance for welding equipment:
-Wiring Verification
We check whether the wiring terminals and internal wiring of each KDHC Series Welding Machine Switch fully comply with design specifications. Confirm correct circuit correspondence for each terminal, avoid wrong wiring risks, ensure safe and reliable connection when assembled into CO₂ welders and plasma cutting machines.
-Position Precision Test
We test the accuracy of each gear. Rotate the switch handle and verify that every gear locks in place accurately.
-Contact Closing & Opening Smoothness Test
Inspect the silver alloy contacts for closing and disconnection performance. Rotate the cam repeatedly to check that contacts close firmly and separate cleanly. The handle rotates smoothly without sticking, jamming or lagging. This prevents poor contact, electric arc and overheating during long-time welding operation.
All products will be rejected if any item fails the inspection. Only qualified switches can be packed and shipped to global customers.
-Inverter Arc Welding Machine Solution
Used in inverter arc welders for manual voltage and current regulation. The stable cam switch reduces interference to the inverter circuit and improves welding seam uniformity.
-Air Plasma Cutting Machine Solution
Serve as circuit changeover component for air plasma cutters. Adjust output parameters to adapt different cutting thickness of carbon steel, stainless steel and alloy plates.
-General Electrical Equipment Circuit Conversion
Besides welding equipment, the KDHC Series Welding Machine Switch can also be applied in other electrical devices for manual, infrequent circuit switching and control.
1. Will the switch gear position be inaccurate after long-term use?
No. All KDHC Series Welding Machine Switch undergo strict gear precision testing before shipment. Each gear position is precisely locked with clear positioning, no offset, no skipping, and each gear corresponds to accurate welding parameters.
2. Is the switch rotation smooth during contact closing and opening?
All switches are strictly tested for contact flexibility. The contacts close firmly and disconnect cleanly. The handle rotates smoothly without jamming, stagnation or poor contact, avoiding arcing and heating failure during welding work.
3. Do you support OEM customization for KDHC Series Welding Machine Switch?
Yes. As a reliable China supplier, manufacturer and factory, we support full OEM and ODM customization, including gear position adjustment, terminal structure modification, logo printing, and special specification development to fit different welder brands.
Address
No.8 Yaming Road, Xiangyang Industrial Zone, Yueqing City, Zhejiang Province, China
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